tenebrity means the quality of being tenebrous; darkness, gloom. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why “tenebrity” is a great word
TENEBRITY — [Noun] The quality or state of being dark, gloomy, or obscure. From the Latin *tenebrae* ("darkness") and the English suffix -*ity* (forming abstract nouns). First attested in 1792. Unlike "obscurity," which drifts toward metaphorical vagueness or anonymity, or "tenebrosity," which suggests a landscape alive with shifting shadows, tenebrity is the pure, distilled essence of gloom itself. It is the profound black of a sealed velvet bag, the patient dark of a sealed tomb, and the absolute murk at the bottom of a disused well—a palpable substance where darkness is the world's default state.
noun
- The quality of being tenebrous; darkness, gloom.